import java.util.Scanner;

public class ScoreStat {

	public static void main(String[] args) {
		// 根据分数给出等级
		Scanner sc = new Scanner(System.in);
		System.out.println("input your score:");
		int score = sc.nextInt();
		if (score >= 90) {
			System.out.println("优秀");
		} else if (score >= 80) {
			System.out.println("良好");
		} else if (score >= 60) {
			System.out.println("中等");
		} else {
			System.out.println("差！");
		}
	}

}
